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Ethanol-powered buses being tested around the world

Cities worldwide will be testing a new type of ethanol-powered bus for their public transportation networks in the coming months, according to a post over at Green Car Congress. The initial tests are set for La Spezia in Italy, but other cities in Europe as well as Brazil and China will soon test the buses made by Scania. This is a project of the BEST (BioEthanol for Sustainable Transport) consortium.

The buses run on a blend of 95 percent ethanol and 5 percent ignition improver in a diesel engine. I haven't heard of this combination before. Scania had to modify the engines to burn ethanol, with the major drawback being that they will burn about 70 percent more ethanol than they would biodiesel. This is an improvement how?